William Formaker, MFT
NPI 1811901143 · Marriage & Family Therapist · Santa Rosa, CA
William Formaker, MFT is a Marriage & Family Therapist provider in Santa Rosa, CA (NPI 1811901143).
Provider details
- NPI number
- 1811901143
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- MFT
- Sex
- Male
- Sole proprietor
- Yes
- License
- MFC29030 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-29
- Last updated
- 2007-07-08
Frequently asked questions
- What is William Formaker's NPI number?
- William Formaker's National Provider Identifier (NPI) is 1811901143, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Formaker's specialty?
- William Formaker is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is William Formaker located?
- William Formaker's practice location on file with NPPES is 606 Beaver St, Santa Rosa, CA 95404-4228.
- What is William Formaker's phone number?
- The practice phone number listed in the NPPES registry for William Formaker is (707) 544-5717.
- Is William Formaker's NPI active?
- Yes — William Formaker's NPI (1811901143) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.